/// <summary>
/// Retreive the value of the gigen tag
/// </summary>
/// <param name="type">Where to look in the card data</param>
/// <param name="tagname">The tag name</param>
/// <returns>The tag data</returns>
public string GetTagValue(EmvConstants.ResponceType type, string tagname)
{
string res = string.Empty;
switch (type)
{
case EmvConstants.ResponceType.All:
res = _GetTagValue(EmvConstants.ResponceType.ReaderRecord, tagname);
if (string.IsNullOrEmpty(res))
{
res = _GetTagValue(EmvConstants.ResponceType.Gpo, tagname);
}
return(res);
case EmvConstants.ResponceType.Select:
throw new NotImplementedException("EMV.ResponceType.Select not implemented");
default:
return(_GetTagValue(type, tagname));
}
}
/// <summary>
/// Handles the retreival of the GetTagValue
/// </summary>
/// <see cref="GetTagValue(EmvConstants.ResponceType, string)"/>
/// <param name="type"></param>
/// <param name="tagname"></param>
/// <returns></returns>
private string _GetTagValue(EmvConstants.ResponceType type, string tagname)
{
string res = null;
switch (type)
{
case EmvConstants.ResponceType.ReaderRecord:
try
{
if (EmvRecords == null)
{
return(null);
}
res = (from r in EmvRecords
from t in r.TLV_READRECORD.TagList
where t?.TagStringName.ToUpper() == tagname.ToUpper()
select t?.TlvData).SingleOrDefault();
}
catch (InvalidOperationException)
{
throw new Exception($"The smartcard has many tags with name {tagname}");
}
break;
case EmvConstants.ResponceType.Gpo:
res = (from t in TLV_GPO.TagList where string.Equals(t.TagStringName, tagname, StringComparison.CurrentCultureIgnoreCase) select t.TlvData)
.SingleOrDefault();
break;
case EmvConstants.ResponceType.Select:
throw new NotImplementedException("EMV.ResponceType.Select");
default:
throw new ArgumentOutOfRangeException(nameof(type), type, null);
}
return(res);
}